The Collaborative International Dictionary of English v.0.48:

Ant-eater \Ant"-eat`er\, n. (Zool.)
   One of several species of edentates and monotremes that feed
   upon ants. See Ant-bear, Pangolin, Aard-vark, and
   Echidna.
   [1913 Webster]

WordNet (r) 3.0 (2006):

anteater
    n 1: toothless mammal of southern Africa and Asia having a body
         covered with horny scales and a long snout for feeding on
         ants and termites [syn: pangolin, scaly anteater,
         anteater]
    2: any of several tropical American mammals of the family
       Myrmecophagidae which lack teeth and feed on ants and
       termites [syn: anteater, New World anteater]
    3: nocturnal burrowing mammal of the grasslands of Africa that
       feeds on termites; sole extant representative of the order
       Tubulidentata [syn: aardvark, ant bear, anteater,
       Orycteropus afer]
    4: small Australian marsupial having long snout and strong claws
       for feeding on termites; nearly extinct [syn: numbat,
       banded anteater, anteater, Myrmecobius fasciatus]
    5: a burrowing monotreme mammal covered with spines and having a
       long snout and claws for hunting ants and termites; native to
       New Guinea [syn: echidna, spiny anteater, anteater]
    6: a burrowing monotreme mammal covered with spines and having a
       long snout and claws for hunting ants and termites; native to
       Australia [syn: echidna, spiny anteater, anteater]